Oil & Gas
| Tue 12 May 2026
Geneva, May 13 -- Petrochina Co Limited has applied WIPO patent for Switchable Sliding Sleeve and Control Method Therefor. Guo Siwen, Lu Hongjun, Wang Shangwei, Ren Guofu, Li Yazhou, Xie Yonggang, Jiang Zhiqiang, Liu Zhongneng, Xue Xiaowei, Yang Yixing, Zhang Huaguang, Liu Jing, Feng Fei, Hu Zijian and Wang Jiaxin developed it.
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